It Seems That I've Slipped Into a Different World. Also, My Gender Has Changed. - Chapter 45: It Arrived, the Wax-Sealed Letter

Shen Zhixian transmigrated into a book as a cannon fodder master who hatefully severed his disciple’s spirit root. This disciple fell into the devil’s path and returned to make mincemeat out of him.

Shen Zhixian just happened to transmigrate into the last moment of the master’s captivity, and then he was reborn again.

After rebirth, he devoted himself to fostering and supporting his disciple, only to discover later that his disciple was also reborn.

Even worse, the disciple still retained the memory of his life before rebirth.

Shen Zhixian: …Disturbed.

Afterward, he realized one truth: Being a master is a high-risk occupation. Not trivial at all!

- Description from Novelupdates

“In the depths of eternity, where darkness and light entwined, the universe was born from the dreams of the gods. From the celestial harmonies of creation to the discordant melodies of destruction, the cosmic symphony echoed across the expanse.Within this grand tapestry, a world emerged, forged from the essence of duality. Earth, a terrestrial haven, became the stage for an epic drama, as forces of creation and destruction converged. The fate of the universe hung in the balance, as two goddesses, Stella and Khaos, wove a narrative of light and darkness, life and death.Their story, a testament to the eternal dance between opposites, would give rise to a new era, one where humanity would inherit the earth, and the delicate balance of the cosmos. Join us on a journey through the ages, as we explore the celestial ballet, the birth of life, and the eternal struggle between creation and destruction.”

Seven days remained until the countdown to genetic mutation.Seven days later, all creatures on Earth would undergo mutations. Giant mutated creatures would swarm and attack humanity, putting their fate in jeopardy. The entire Earth would be ruled by these mutated beings!Yang Xiao accidentally walked into a genetic store where various gene potions were sold, capable of altering human body functions.From that moment on, he embarked on a crazy journey of genetic evolution.

After Reincarnating into Naruto World at the Warring State Era as an Uzumaki, Masahiko thought that he got a useless System. He lived for 48 years as a normal, below average Uzumaki Shinobi.

That changed when he finally knew how the system works the day of his 49th Birthday!

- Description from Novelupdates